Windproof umbrella



FIG. 1 is a side view of a windproof umbrella, in a closed condition, showing our new design;

FIG. 2 is a top perspective view of the windproof umbrella, in an open condition, showing our new design;

FIG. 3 is a bottom perspective view of the windproof umbrella shown in FIG. 2;

FIG. 4 is a top view of the windproof umbrella shown in FIG. 2;

FIG. 5 is a bottom view of the windproof umbrella shown in FIG. 2; and,

FIG. 6 is an exploded top perspective view of a windproof umbrella, in an open condition, showing our new design. 

The ornamental design for a windproof umbrella, as shown. 